Conference Agenda

Gas Transport in the Barrier – Lessons learnt from BenVaSim-II, EURAD-GAS and DECOVALEX2023

Michael Pitz^1,2, Gesa Ziefle¹, Jobst Maßmann¹, Eike Radeisen^1,4, Norbert Grunwald^3,2, Olaf Kolditz^3,4, Thomas Nagel^2,3

¹Federal Institute for Geosciences and Natural Resources; ²Technische Universität Bergakademie Freiberg; ³Helmholtz Center for Environmental Research; ⁴Technical University Dresden

An Assessment Strategy for the Evaluation of Radionuclide Migration from Potential Repositories in Claystone

Christoph Behrens, Merle Bjorge, Julia Dose, Marlene Gelleszun, Niklas Meindl, Florian Panitz, Shorash Miro, Alexander Renz, Robert Seydewitz, Wolfram Rühaak, Stephanie Zeunert, Phillip Kreye

Bundesgesellschaft für Endlagerung mbH, Eschenstraße 55, 31224 Peine, Germany

CIGEO project - Analysis of the effect of segmental lining joints on the tunnel mechanical behaviour during the operational phase and over the long term

Marco Camusso¹, Minh-Ngoc Vu²

¹ITASCA Consultants S.A.S., Lyon, France; ²ANDRA, Châtenay-Malabry, France

Adapting disposal concepts to reflect emerging UK geologiccal environments

Matthew Edward Kirby, Simon Norris

Nuclear Waste Services, United Kingdom

New data on the compositional-structural characteristics of the Opalinuston Formation from Southern Germany: Facies-based investigations and mineralogical analyses

Tilo Kneuker¹, Thomas Mann¹, Reiner Dohrmann^1,2, Kristian Ufer¹, Jochen Erbacher¹, André Bornemann¹, Bernhard Schuck¹, Lukas Pollok¹

¹Federal Institute for Geosciences and Natural Resources, Hannover, Germany; ²State Authority for Mining, Energy and Geology (LBEG), Hannover, Germany

Effects of ionic strength on cation exchange selectivities of Ca(II), Mg(II), K(I) for Na(I) in compacted and dispersed montmorillonite

Ryo Yasuda¹, Shingo Tanaka¹, Daisuke Hayashi¹, Hitoshi Owada¹, Tomoko Ishii³, Yukinobu Kimura²

¹Radioactive Waste Management Funding and Research Center, Japan; ²Obayashi Corporation Co., Ltd.; ³Taiheiyo Consultant Co., Ltd

Geochemical investigation of veins and evidence for paleo fluid flow in Opalinus Clay

Lukas Aschwanden¹, Nathan Looser², Martin Mazurek¹, Thomas Gimmi^1,3, Daniel Traber⁴

¹University of Bern, Switzerland; ²ETH Zürich, Switzerland; ³Paul Scherrer Institut, Villigen, Switzerland; ⁴NAGRA, Wettingen, Switzerland

Comparison of the clay mineralogy of fault and host rocks in the Opalinus Clay, Switzerland

Jonas Strasser, Susanne Gier, Kurt Decker

University of Vienna, Austria

CO2 Long-term Periodic Injection Experiment (Mont Terri URL): Introduction to the in-situ experiment and results of the first phase

Martin Ziegler¹, David Jaeggi¹, Rolf Kipfer², Antonio Pio Rinaldi³, Anne Obermann³, Jonas Junker³, Hua Shao⁴, Markus Furche⁴

¹Federal Office of Topography, Mont Terri Underground Rock Laboratory, St. Ursanne, Switzerland; ²Department Water Resources and Drinking Water, EAWAG, Dübendorf, Switzerland; ³Swiss Seismological Service, ETH Zurich, Zurich, Switzerland; ⁴Federal Institute for Geosciences and Natural Resources, Hannover, Germany

Extraction, Quantification and Isotopic Characterisation of Gases Dissolved in Porewater of Argillaceous Rocks - Method Comparison and Evaluation

Florian Eichinger¹, Laura Kennell², Niko Kampman³

¹Hydroisotop GmbH, Germany; ²NWMO, Canada; ³Nuclear Waste Services, UK

GeM-DB – A basis for planning surface exploration programs

Raphael Dlugosch, Thies Beilecke, Tilo Kneuker, Lukas Pollok, Lisa Richter, Nicole Schubarth-Engelschall, Ralf Semroch

Federal Institute for Geosciences and Natural Resources, Germany

Influence of Rescue Chambers on the Design of Geological Repositories in Clay

Felix Lehnen, Berit Rauscher

Brenk Systemplanung GmbH, Germany

MiniSandwich experiment – performance test in laboratory of a bentonite-based shaft sealing system

Christopher Rölke¹, Katja Emmerich², Eleanor Bakker², Hua Shao³

¹Institut für Gebirgsmechanik GmbH Leipzig (IfG), Germany; ²Karlsruher Institut für Technologie (KIT), Germany; ³Bundesanstalt für Geologie und Rohstoffe (BGR), Germany

Long term monitoring of physical and chemical parameters of a ce-mento-bentonitic filling material (CBFM) and of corrosion potential of a horizontal pipe made of carbon steel, submerged by the CBFM into a sealed cell of underground gallery

Ioannis IGNATIADIS¹, Yendoube Charles SANO MOYEME², Johan BERTRAND³, Stéphanie BETELU⁴

¹BRGM, France; ²BRGM, France; ³ANDRA, France; ⁴BRGM, France

Multi-scale modelling of the Sandwich experiment in Mont Terri

Larissa Friedenberg, Matthias Hinze, Klaus Wieczorek

Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany

Study on the construction of disposal scenarios and a tentative migration modelling of cesium for the final disposal of radioactive-ly contaminated waste outside of Fukushima Prefecture

Eriko Minari, Kazuo Yamada, Kazuto Endo

National Institute of Environmental Studies, Japan

All‑solid‑state reference electrode based on lithium lanthanum tita-nium oxide (LLTO) for the long term monitoring of nuclear waste dis-posals

Djouhar AOUBIDA^1,3, quoc-nghi PHAM³, Stéphanie BETELU¹, Johan BERTRAND², Nita DRAGOE³, Ioannis IGNATIADIS¹

¹BRGM (French Geological Survey), Orleans, France; ²ANDRA (French national radioactive waste management agency), Châtenay-Malabry, France; ³ICMMO (Institute of Molecular Chemistry and Materials), Orsay, France

Direct Mineral Content Prediction from Drill Core Images via Transfer Learning

Romana Boiger¹, Sergey V. Churakov^1,2, Ignacio Ballester Llagaria^1,3, Georg Kosakowski¹, Raphael Wüst^4,5, Nikolaos I. Prasianakis¹

¹Paul Scherrer Institute, Switzerland; ²University of Bern, Switzerland; ³ETH Zürich, Switzerland; ⁴Nagra, Switzerland; ⁵James Cook University, Australia

OpenWorkFlow - Open-source synthesis-platform for safety in-vestigations in the site selection process

Olaf Kolditz^1,4, Christoph Lehmann¹, Thomas Nagel², Christoph Behrens³, Alexander Renz³, Phillip Kreye³, Wolfram Rühaak³

¹Helmholtz-Zentrum für Umweltforschung GmbH UFZ, Germany; ²TU Bergakademie Freiberg; ³BGE Bundesgesellschaft für Endlagerung mbH; ⁴Dresden University of Technology

DEVELOPMENT AND USE OF THE THERMOCHIMIE DATABASE

Stéphane Brassinnes¹, Benoît Madé², Will Bower³

¹Belgian Agency for Radioactive Waste and Enriched Fissile Materials (ONDRAF/NIRAS); ²Agence nationale pour la gestion des déchets radioactifs (Andra); ³Nuclear Waste Services (NWS)

Investigating the Effects of Small Organic Molecules on the Adsorption of Uranyl on Clay Minerals with Molecular Dynamics

Jakub Ličko, Andrey G. Kalinichev

SUBATECH (UMR 6457 – IMT Atlantique, Nantes Université, CNRS-IN2P3), France

Numerical investigation of pore characteristics in spherical and platelet particle beds

Otono Miura¹, Ryunosuke Oishi¹, Tsubasa Yagi², Shusaku Harada¹

¹Hokkaido University, Japan; ²Radioactive Waste Management Funding and Research Center, Japan

Influence of salinity gradients on the diffusion of water and ionic species in dual porosity clay samples

Emmanuel Tertre¹, Thomas Dabat¹, Jingyi Wang², Sebastien Savoye², Fabien Hubert¹, Baptiste Dazas¹, Christophe Tournassat^3,4, Eric Ferrage¹

¹Université de Poitiers/CNRS, UMR 7285 IC2MP, Equipe HydrASA, 5 rue Albert Turpain, Bât. B8, TSA - 51106, 86073 Poitiers cedex 9, France; ²Université Paris-Saclay, CEA, Service d'Etude du Comportement des Radionucléides, 91191 Gif-sur Yvette, France; ³ISTO, UMR 7327, Univ. Orleans, CNRS, BRGM, OSUC, F-45071 Orléans, France; ⁴Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, USA

Diffusion experiment (36Cl, 3H) across concrete/claystone interface

Urs Mäder¹, Lukas Martin², Carmen Zwahlen³, Sandra Baur⁴, Christoph Vockenhuber⁵, Andreas Jenni³, Martin Heule⁴, Marcus Christl⁵, Mirjam Kiczka³, Josep Soler⁶

¹Rock-Water Consulting, Boll, Switzerland; ²Nagra, Wettingen, Switzerland; ³University of Bern, Switzerland; ⁴Paul Scherrer Institut, Switzerland; ⁵ETH Zuerich, Switzerland; ⁶CSIC Barcelona, Spain

Long Term Safety studies at EDF with code_saturne

Jérôme BONELLE, Marc KHAM, Raphael LAMOUROUX

EDF, France

Interaction of groundwater in crystalline rock and a compacted bentonite buffer

Michael Kröhn, Klaus-Peter Kröhn

GRS gGmbH, Germany

Migration of caesium decreases with increasing compaction of MX-80 bentonite

Theresa Hennig¹, Sina Grossmann², Jens Mibus³, Luc R. Van Loon⁴, Martin A. Glaus⁴, Vinzenz Brendler⁵

¹GFZ German Research Centre for Geosciences, Fluid Systems Modelling, Potsdam, Germany; ²VKTA Radiation Protection, Analytics and Disposal Rossendorf Inc., Environmental and Radionuclide Analyses, Dresden, Germany; ³Federal Office for the Safety of Nuclear Waste Management (BASE), Department A Supervision, Berlin, Germany; ⁴Paul Scherrer Institut, Laboratory for Waste Management, Villigen PSI, Switzerland; ⁵Helmholtz-Zentrum Dresden Rossendorf e.V., Institute of Resource Ecology, Dresden, Germany

Impact of temperature on the transfer of mobile tracers in the Toarcian clayrock at the Tournemire URL

Maïwenn Humbezi Desfeux¹, Jean-Michel Matray¹, Manuel Marcoux²

¹Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SPDR/LETIS, Fontenay-aux-Roses, F-92260, France; ²Institut de Mécanique des Fluides de Toulouse, UMR 5502 CNRS/INP/UPS 31400 Toulouse, France

Diffusion of Np through Illite du Puy

Claudia Joseph^1,2, Bianca Schacherl¹, Tonya Vitova¹, Polina Lavrova¹, Theresa Hennig³, Michael Kühn^3,4

¹Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), Germany; ²Bundesgesellschaft für Endlagerung, Germany; ³GFZ German Research Centre for Geosciences, Fluid Systems Modelling, Germany; ⁴University of Potsdam, Institute of Geosciences, Germany

Optimizing Wellbore Sealing with Japanese Na-Bentonite: In-sights from Two Vertical Wells at Grimsel Test Site, Switzerland

Takanori Kunimaru¹, Raphael Schneeberger², Armin Pechstein², Stratis Vomvoris²

¹NUMO, Japan; ²Nagra, Switzerland

Experimental and modelling study of the hydro-chemo-mechanical behaviour of sand bentonite mixtures in hyperalkaline conditions

Christophe IMBERT¹, Andrés IDIART², Sebastien SAVOYE¹, Wissem DRIDI¹, Marcelo LAVIÑA², Miquel DE LA IGLESIA², Nicolas MICHAU³, Benoit COCHEPIN³, Jean TALANDIER³

¹Paris-Saclay University, CEA, DRMP, 91191, Gif-sur-Yvette, France; ²Amphos 21 Consulting S.L., Barcelona, Spain; ³Andra, R&D Division, F-92298 Châtenay Malabry, France

Reactive Transport Modelling of Material Interface Evolution in the HLW Near-field

Georg Kosakowski¹, Lukas Martin²

¹Paul Scherrer Institut, Switzerland; ²Nagra, Switzerland

Understanding the Effect of Indigenous Microorganisms in Bentonite on the Biocorrosion of Metal Canisters, for the Final Disposal of Nuclear waste (Under Relevant DGR Conditions)

Adam David Mumford¹, Marcos Martinez-Moreno², Cristina Povedano-Priego², Mar Morales-Hidalgo², Miguel Ruiz-Fresneda², Yon Ju-Nam¹, Mohamed L. Merroun², Jesus J. Ojeda¹

¹Swansea University, Department of Chemical Engineering, United Kingdom; ²University of Granada, Department of Microbiology, Spain

Cation exchange parameters for Opalinus Clay and its confining units

Paul Wersin, Lukas Aschwanden, Mirjam Kiczka

University of Bern, Switzerland

Geochemical alteration in selected bentonites affected by thermal interaction with steel and saline solution hydration

Raúl Fernández, Carlos Mota-Heredia, Jaime Cuevas

Autonomous University of Madrid, Spain

Iron-bentonite interaction in a water-saturated low temperature environment: mineralogy and microstructure

María Jesús Turrero¹, Elena Torres¹, Pedro Luis Martín¹, Raúl Fernández², Ana Isabel Ruiz², Almudena Ortega², Antonio Garralón^1,2, Belén Notario³, Carlos Mota², Jaime Fernando Cuevas²

¹Ciemat, Madrid, Spain; ²UAM, Madrid, Spain; ³CENIEH, Burgos, Spain

Mineralogical evolution of COx claystone during in situ MCO experiment

Isabella Pignatelli¹, Nicolas Michau², Yannick Linard²

¹Université de Lorraine, Laboratoire CRPG, CNRS UMR 7358, 15 rue Notre-Dame des Pauvres, 54500, Vandœuvre-lès-Nancy, France; ²Andra, Scientific & Technical Division, Waste, Radionuclides, Chemicals & Geochemistry Department, 1/7 rue Jean Monnet, F-92298 Châtenay-Malabry CEDEX, France

Anoxic corrosion of carbon steel in different cementitious media and high temperature conditions: comparison between laboratory test and in situ experiment results

Charles Wittebroodt¹, Jules Goethals², Bojan Zajec³, Valery Detilleux⁴, Laurent De Windt⁵

¹IRSN, France; ²CEA, France; ³ZAG, Slovenia; ⁴Bel-V, Belgium; ⁵Mines Paris, France

Redox buffering by iron-bearing clay minerals in the ferrous iron/smectite system

Harry J. L. Brooksbank², Anke Neumann^1,2

¹PSI Paul Scherrer Institut, Switzerland; ²Newcastle University, UK

Modelling the reactive transport processes in unsaturated clay barriers – inclusion of capillary geochemistry

Shao-Jie Wu, Majid Sedighi, Andrey Jivkov

The University of Manchester, United Kingdom

Microbial ecology of engineered barrier components of a deep geological repository for used nuclear fuel

Rachel C. Beaver¹, Rhiannon Punch¹, Cailyn Perry¹, Claire S. Tully², Katja Engel¹, Melody A. Vachon¹, W. Jeffrey Binns³, Chang Seok Kim³, James J. Noël², Josh D. Neufeld¹

¹University of Waterloo, Waterloo, Canada; ²Western University, London, Canada; ³Nuclear Waste Management Organization, Toronto, Canada

Steel corrosion and reactive transport model in bentonite for predicting spent fuel disposal package lifetime

Milan Hokr¹, Lucie Baborová², Jan Šembera¹, Vratislav Žabka¹, Jan Stoulil³, Dušan Vopálka², Eva Bedrníková⁴, Petr Večerník⁴, David Dobrev⁴

¹Technical University of Liberec, Czech Republic; ²Czech Technical University in Prague, Faculty of Nuclear Sciences and Physical Engineering, Czechia; ³University of Chemistry and Technology Prague, Czechia; ⁴ÚJV Řež, a.s., Czechia

Experimental study of swelling and permeability of a Bavarian bentonite, Friedland clay, and Opalinus clay at 35–150 °C

Artur Meleshyn, Matthias Hinze, Marvin Middelhoff

GRS gGmbH, Germany

A new experimental system for studying gas formation and release during laboratory rock core heating experiments

Christian Ostertag-Henning, Oliver Helten

Federal Institute for Geosciences and Natural Resources (BGR), Germany

Temperature Influence on Swelling Pressure of Ca-Bentonite up to 150 °C

Deuk-Hwan Lee, Gi-Jun Lee, Seeun Chang, Minhyeong Lee, Seok Yoon, Chnagsoo Lee, Dong-Keun Cho

Korea Advanced Energy Research Institute, Korea, Republic of (South Korea)

The CHENILLE experiment: Coupled beHaviour undErstaNdIng of fauLts: from the Laboratory to the fiEld

Rüdiger Giese¹, Audrey Bonnelye², Pierre Dick³, Carolin Böse¹, Stefan Lueth¹, Ben Norden¹, Katrin Plenkers⁴, Roman Esefelder⁵, Christian Cunow¹, Sven Fuchs¹

¹German Research Centre for Geosciences GFZ, Germany; ²Université de Lorraine, Georessources, Ecole des Mines de Nancy, France; ³Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SPDR/LETIS, Fontenay-aux-Roses, F-92260, France; ⁴4 Gesellschaft für Material­prüfung und Geophysik (GmuG), Bad Nauheim, Germany; ⁵Friedrich-Schiller-Universität, Institut für Geowissenschaften, Jena, Germany

COCONS: A numerical tool for Thermo-Hydro-Mecanical dimensioning of a deep geological repository High Level Waste area

Florian Escoffier, Sylvie Granet, Geoffroy Mélot, Isabelle Rupp

EDF R&D, France

HotBENT at the Grimsel Test Site - Early THMC evolution of a buffer at up to 200°C

Florian Kober¹, Raphael Schneeberger¹, Stefan Finsterle², Stratis Vomvoris¹, Bill Lanyon³

¹Nagra, Switzerland; ²Finsterle GeoConsulting, LLC, Kensington, CA, United States; ³Fracture Systems Ltd., St. Ives, Great Britain

Thermo-hydraulic characterization of bentonite in partially saturated conditions at two temperature levels

Eleonora Crisci¹, Raphael Schneeberger², Alexandros Papafotiou², Florian Kober²

¹Nesol Numerical Engineering Solutions, Lausanne, Switzerland; ²Nagra, National Cooperative for the Disposal of Radioactive Waste, Wettingen, Switzerland

Identification of key parameters in coupled thermal-hydraulic analysis model for unsaturated Kunigel V1 bentonite

Yusaku Takubo¹, Yusuke Takayama², Keisuke Ishida¹

¹Nuclear Waste Management Organization of Japan (NUMO), Japan; ²Japan Atomic Energy Agency (JAEA), Japan

Thermally Aged (165oC-200oC) Bentonite Performance

Sirpa Kumpulainen¹, Jari Martikainen¹, Teemu Laurila¹, Olivier Leupin², Florian Kober²

¹MITTA, Finland; ²Nagra, Switzerland

Swelling, outflow, and permeability characteristics of bentonite in NaCl solutions of various concentrations

Masanori Kohno, Shun Kohdo, Tsuyoshi Nishimura

Tottori University, Japan

Modelling air convection in a segmented buffer

Peter Eriksson

SKB, Sweden

Mineralogical and geotechnical characterization of two German bentonites from Westerwald and Bavaria

Ali Asaad¹, Antonia Nitsch², Wiebke Baille², Katja Emmerich¹

¹Institute of Concrete Structures and Building Materials (IMB, MPA, CMM), Karlsruhe Institute of Tech-nology (KIT), Karlsruhe, Germany; ²Chair of Soil Mechanics, Foundation Engineering and Environmental Geotechnics, Department of Civil and Environmental Engineering, Ruhr-University Bochum, Bochum, Germany

Implications of groundwater composition on the performance of ben-tonite components in nuclear waste disposal facilities

Han Ming Lai¹, Lidija Zdravkovic¹, David M. Potts¹, Matthew Kirby²

¹Imperial College London, United Kingdom; ²Nuclear Waste Services, UK

The alteration of bentonite in contact with carbon steel

Šárka Šachlová¹, Petr Bezdička², Michaela Matulová³, Vlastislav Kašpar¹, Karol Kočan¹, Zbyněk Veselka⁴, Petr Večerník¹

¹ÚIJV Řež, a.s., Radioactive waste and decommissioning; ²Institute of Inorganic Chemistry of the Czech Academy of Sciences; ³Radioactive Waste Repository Authority; ⁴ÚJV Řež, a. s., Integrity and Technical Engineering,

Numerical Modelling of Volume Change Behaviour in Bentonite Buffer Exposed to Thermo-Hydraulic Gradients

Pavan Kumar Bhukya¹, Nandini Adla¹, Wang Xuerui², Dali Naidu Arnepalli¹

¹Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, Tamil Nadu, India; ²Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Braunschweig, Germany

Shear resistance of bentonite with non-uniformity distribution in suction

Tomoyoshi Nishimura¹, Takayuki Motoshima², Sachie Iso²

¹Department of Civil Engineering, Ashikaga University, Tochigi, Japan; ²Nuclear Facilities Division, Taisei Corporation, Tokyo, Japan

Verification of Von Mises and modified Cam clay models’ imple-mentation using analytical solutions. Triaxial tests simulation.

Jordi Alcoverro¹, Xavier Pintado², Juha Kuutti³, Ville Heino⁴

¹Technical University of Catalonia, Spain; ²Mitta Engineering Oy, Finland; ³VTT, Finland; ⁴Posiva Oy, Finland

Reactive transport models of the interactions of corrosion products and unsaturated FEBEX bentonite in laboratory and in situ tests

Javier Samper, Alba Mon, Luis Montenegro

Universidad de A Coruña, Spain

The impact of NaNO3 on the diffusion of dissolved gases in clay

Elke Jacops¹, Chloé Roonacker², Hannes Claes³, Lander Frederickx¹, Anneleen Vanleeuw¹, Phung Quoc Tri¹, Jerry Peprah Owusu^4,6, Jon Harrington⁵, Andy Wiseall^5,7, Christophe Bruggeman¹

¹SCK CEN, Belgium; ²ULg, Belgium; ³KU Leuven, Belgium; ⁴PSI, Switzerland; ⁵BGS, United Kingdom; ⁶University of Bern, Switzerland; ⁷NWS, United Kingdom

Modelling of mock-up tests for bentonite seals

Sonja Kaiser¹, Aqeel Afzal Chaudhry¹, Martin Hofmann¹, Thomas Nagel^1,2

¹TU Bergakademie Freiberg, Freiberg, Germany; ²Freiberg Center for Water Research - ZeWaF, Freiberg, Germany

A study on buffer-material erosion under constant water head condition

Kenji Ishii¹, Akihiro Matsumoto¹, Ichizo Kobayashi¹, Hirohito Kikuchi², Daisuke Hayashi²

¹Kajima Corporation, Tokyo, Japan; ²Radioactive Waste Management Funding and Research Center, Tokyo, Japan

Filling efficiency of mono-sized pellets for sealing boreholes for a wide range of borehole-to-pellet diameter ratios

Ayaka Sakaki¹, Toshihiro Sakaki²

¹International Christian University, Japan; ²ESE Consulting LLC, Japan

Gas in radwaste deep geological repositories: example from Bure URL in clay rich formation

Rémi DE LA VAISSIERE, Jean TALANDIER, Christophe DE LESQUEN, Gilles ARMAND

ANDRA, France

Particle size evolution of granular bentonite on wetting and loading

Hao Zeng¹, Laura Gonzalez-Blanco^2,1, Enrique Romero^1,2

¹Universitat Politècnica de Catalunya (UPC), Barcelona, Spain; ²International Centre for Numerical Methods in Engineering (CIMNE), Barcelona, Spain

Role of poromechanical couplings in gas fracturing around an excavation

Mohammad-Youssef FALLAH-SOLTANABAD¹, Amade POUYA¹, Laurent BROCHARD¹, Minh-ngoc VU², Christophe DE LESQUEN²

¹Navier Laboratory, Ecole des Ponts ParisTech, Gustave Eiffel University, CNRS, 77455 Marne la Vallée, France; ²Andra R&D, 92290 Châtenay-Malabry, France

Impact of Heterogeneity in 3D THM-G Modelling of Laboratory to Field-Scale Tests in the Context of Nuclear Waste Repository Design

Erdem Toprak, Sebastia Olivella

CIMNE, Spain

Assessment of the effect of heterogeneities on the hydromechanically coupled behavior of two German bentonites

Wiebke Baille¹, Antonia Nitsch¹, Torsten Wichtmann¹, Ali Asaad², Katja Emmerich²

¹Ruhr-Universität Bochum, Germany; ²Karlsruhe Institute of Technology (KIT), Germany

Microstructural Examination of Gas Migration Influence in Heterogeneous Pellet/Powder Bentonite Mixtures Using X-ray Computed Micro-Tomography

Mohammed ZAIDI, Nadia MOKNI, Magdalena DYMITROWSKA, Kui LIU

Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-ENV/SPDR/LETIS, Fontenay-aux-Roses, F-92260, France

Suitability investigations of Lithuanian clay formations for the deep geological repository of radioactive wastes

Roma Kanopiene

Lithuanian geological survey, Lithuania

Modelling of unsaturated homogenisation with an enhanced bentonite material model using COMSOL Multiphysics

Alex Spetz, Ola Kristensson, Daniel Malmberg

Clay Technology, Sweden

CEC as quality proof for smectitic phases in lower Cretaceous clay rocks – illite-smectite ± pure smectite?

Reiner Dohrmann^1,2, Kristian Ufer¹, Tilo Kneuker¹, Jochen Erbacher^1,2, André Bornemann¹

¹BGR, Germany; ²LBEG, Germany

Multi-scale 2D and 3D characterisation for enhanced understanding of UK lower strength sedimentary rocks.

Kevin G Taylor, Lin Ma, Holly Mills, Xin Zhong, Ke Wang

University of Manchester, United Kingdom

Unravelling the depositional model of the Opalinus Clay using grain-size variability

Géraldine Nicole Zimmerli¹, Stephan Wohlwend², Gaudenz Deplazes³, Thomas Mann⁴, Anneleen Foubert¹

¹Department of Geosciences, University of Fribourg, Fribourg, Switzerland; ²Institute of Geological Sciences, University of Bern, Bern, Switzerland; ³Nagra (National Cooperative for the Disposal of Radioactive Waste), Wettingen, Switzerland; ⁴Federal Institute for Geosciences and Natural Resources (BGR), Hannover, Germany

Influence of texture on the chloride accessible porosity fraction explored by SEM and µCT data

Carmen Andrea Zwahlen¹, Thomas Gimmi^1,2, Andreas Jenni¹, Martin Mazurek¹, Daniel Traber³, Raphael Wüst³

¹University of Bern, Switzerland; ²Paul Scherrer Institut, Switzerland; ³Nagra, Switzerland

Exploring the dynamics of aquifer - aquitard systems: new insights from 81Kr model ages

Daniel Traber¹, Nicolas Roy¹, Emiliano Stopelli¹, Michael Heidinger², Florian Eichinger², Christoph Wanner³, Thomas Gimmi³, H. Niklaus Waber⁴, Jin Ma³

¹Nagra, Wettingen, Switzerland; ²Hydroisotop GmbH, Schweitenkirchen, Germany; ³University of Bern, Bern, Switzerland; ⁴WaterGeoChem Consulting, Bern, Switzerland

Mont Terri BIM — Project overview and technical realisation

Martin Ziegler¹, Senecio Schefer¹, Stefan Volken²

¹Swiss Federal Office of Topography (swisstopo), St-Ursanne, Switzerland; ²Swiss Federal Office of Topography (swisstopo), Wabern, Switzerland

Geochemistry and pore water in the lower confining units of the Opalinus Clay at Mont Terri Rock Laboratory (Switzerland)

Ana María Fernández¹, Catherine Lerouge², Francisco Javier León¹, Paula Nieto¹, David Jaeggi³, Michael Kühn⁴

¹CIEMAT, Spain; ²BRGM, France; ³Swisstopo, Switzeland; ⁴Helmholtz-Zentrum Potsdam, Germany

Underground storage of high-grade radioactive waste in mudrock: In search of the Holy Grail

Laurence Warr, Georg Grathoff

University of Greifswald, Germany

Development and Emplacement of an Annular Grout Envisaged for HLW Emplacement Drifts to Study Long-Term Interaction with Opalinus Clay

Lukas Martin¹, Wolfgang Seidl², Sebastian Kernbichl², Nicole Wieser², René Bolliger³, Julien Bizzozero³

¹Nagra, Switzerland; ²Master Builders Solutions Deutschland GmbH, Trostberg, Germany; ³Master Builders Solutions Schweiz AG, Holderbank, Switzerland

Monitoring fluid movement and swelling pressure development in semi-technical scale Sandwich sealing system experiments

Martin Hofmann¹, Eleanor Bakker², Franz Königer³, Thomas Nagel¹, Rainer Schuhmann³, Katja Emmerich²

¹TU Bergakademie Freiberg, Germany; ²Karlsruhe Institute of Technology, Germany; ³ISU mbH, Germany

3D Hydro-Mechanical modelling to support the design of the REG experiment in the Callovo-Oxfordian Claystone

Gilles Corman¹, Abhishek Rawat¹, Jean Talandier², Rémi de La Vaissiere², Youssef Fawaz², Frédéric Collin¹

¹University of Liège, Belgium; ²Andra, France

Development of Boron-Enhanced Metakaolin-Based Geopolymers for the Immobilisation of Radioactive Debris with the potential of Neutron Absorption

Xiaobo Niu, Yogarajah Elakneswaran, Ryosuke Kikuchi

Hokkaido University, Japan

Performance of MoxOy pH sensor prepared by thermal oxidation for the long term monitoring of nuclear waste disposals

Djouhar AOUBIDA^1,3, Stéphanie BETELU¹, Johan BERTRAND², quoc-nghi PHAM³, Nita DRAGOE³, Ioannis IGNATIADIS¹

¹BRGM (French Geological Survey), Orleans, France; ²ANDRA (French national radioactive waste management agency), Châtenay-Malabry, France; ³ICMMO (Institute of Molecular Chemistry and Materials), Orsay, France

Cation exchange capacity measurement for bentonite-cement reactions in a nuclear waste disposal - what are we really measuring?

Arkadiusz Derkowski¹, Adam Zięba¹, Reiner Dohrmann^2,3, Stephan Kaufhold³

¹Institute of Geological Sciences, Polish Academy of Sciences, Krakow, Poland; ²tate Authority for Mining, Energy and Geology (LBEG), Hannover, Germany; ³Federal Institute for Geosciences and Natural Resources (BGR), Hannover, Germany

Influence of microstructure and pore saturation in measuring corro-sion rates of a carbon steel API 5L X65 in contact with cement grout in future nuclear waste disposal program

Yendoube Charles SANO MOYEME¹, Stéphanie BETELU¹, Johan BERTRAND², Stéphane GABOREAU¹, Karine GROENEN-SERRANO³

¹BRGM, France; ²ANDRA, France; ³LGC, France

Differentiation of fractures and rock mass deformation in clay rocks by Machine Learning

Rushan Wang^1,2, Andrea Manconi^1,2, Martin Ziegler³

¹WSL Institute for Snow and Avalanche Research SLF; ²Climate Change, Extremes and Natural Hazards in Alpine Regions Research Centre CERC; ³Swiss Federal Office of Topography (swisstopo)

Large-scale reactive transport simulations of uranium migration in Opalinus Clay accelerated by means of surrogate models

Marco De Lucia¹, Max Lübke², Theresa Hennig¹, Bettina Schnor²

¹GFZ German Research Centre for Geosciences, Fluid Systems Modelling, Potsdam, Germany; ²University of Potsdam, Institute of Computer Science, Potsdam, Germany

Measurement of pore water density in a bentonite using decalin

Hailong Wang

Waseda University, Japan

Development of test specimens for evaluating permeability measurements of tight rocks

Carlo Dietl

Federal Office for the Safety of Nuclear Waste Management (BASE), Germany

CP1 and Tribicarb-3D: unique long term and large scale in situ migration tests in Boom Clay at the HADES Underground Research Laboratory

Marc Aertsens¹, Eef Weetjens¹, Joan Govaerts¹, Norbert Maes¹, Stéphane Brassinnes²

¹SCK CEN, Belgium; ²ONDRAF/NIRAS, Belgium

EFFECT OF REDOX STATE ON THE REDOX SENSITIVE ELEMENT RETENTION BY APTIAN SANDS

Esra Orucoglu¹, Sylvain Grangeon¹, Myriam Agnel², Benoît Madé³, Mathieu Debure¹

¹BRGM, Orléans, France; ²ANDRA, Centre de Meuse/Haute-Marne, Bure, France; ³ANDRA, R&D Division, Châtenay-Malabry, France

Mechanochemical activation of synthetic Na-n-micas – applications in retention of high-level radioactive waste

Aníbal López-Marín¹, Rosa Martín-Rodríguez^1,2, Fernando Aguado^2,3, Ana C. Perdigón^1,2

¹QUIPRE Department, University of Cantabria, Avda. Los Castros, 46, 39005, Santander, Spain.; ²Nanomedicine Group, IDIVAL, Avda. Cardenal Herrera Oria s/n, 39011, Santander, Spain.; ³CITIMAC Department, Universidad de Cantabria, Avda. Los Castros, 48, 39005, Santander, Spain.

Development of a separation method for Am-, Sr-, Pu- and U-isotopes in concrete using extraction chromatography

Gloria Steckholzer, Claudia Landstetter, Krystle Elbers, Rainer Kadan

AGES- Austrian Agency for Health and Food Safety, Austria

Migration behaviour of Ra-226 in the sandy facies of Opalinus Clay

Naila Ait-Mouheb¹, Victor Vinograd Vinograd¹, Martina Klinkenberg¹, Jenna Poonoosamy¹, Guido Deissmann¹, Luc R. Van Loon², Dirk Bosbach¹

¹Institute of Energy and Climate Research – Nuclear Waste Management (IEK-6), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany; ²Laboratory for Waste Management, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland

Donnan equilibrium in compacted bentonite

Magnus Hedström¹, Ya-Wen Hsiao²

¹Clay Technology, Sweden; ²Hartree Centre, STFC Daresbury Laboratory, Daresbury WA4 4AD, UK

Neptunium migration in Opalinus Clay - one experiment with multiple numerical geochemical solutions

Theresa Hennig¹, Madlen Stockmann², Claudia Joseph², Vinzenz Brendler³, Tobias Reich⁴, Michael Kühn^1,5

¹GFZ German Research Centre for Geosciences, Fluid Systems Modelling, Potsdam, Germany; ²Bundesgesellschaft für Endlagerung mbH (BGE), Peine, Germany; ³Helmholtz Zentrum Dresden Rossendorf e.V., Institute of Resource Ecology, Dresden, Germany; ⁴Johannes Gutenberg Universität Mainz, Department of Chemistry, Mainz, Germany; ⁵University of Potsdam, Institute of Geosciences, Potsdam, Germany

Effective diffusivity prediction by considering multivariable regression and rock properties

Nikolaos Prasianakis¹, Romana Boiger¹, Georg Kosakowski¹, Raphael Wüst², Sergey Churakov^1,3

¹Laboratory for Waste Management, Paul Scherrer Institute, CH-5232 Villigen, Switzerland; ²Nagra, Wettingen, Switzerland; ³University of Bern, Institute of Geological Sciences, CH-3012 Bern, Switzerland

Successful gas tests at the GAs permeable Seal Test (GAST) - Highlights and lessons learned (Grimsel Test Site, CH)

Emiliano Stopelli¹, Thomas Spillmann¹, Bill Lanyon², Rémi de La Vaissière³, Jean Talandier³, Jeremy Chen⁴, Simon Norris⁵, Stratis Vomvoris¹, Irina Gaus¹, Florian Kober¹

¹Nagra, Switzerland; ²Fracture Systems Ltd, United Kingdom; ³ANDRA, France; ⁴NWMO, Canada; ⁵NWS, United Kingdom

Harnessing microbial processes consuming hydrogen in radioac-tive waste repositories

Camille Rolland¹, Olivier Leupin², Rizlan Bernier-Latmani¹

¹École Polytechnique Fédérale de Lausanne (EPFL) Environmental Microbiology Labo-ratory, CH-1015 Lausanne, Switzerland; ²National Cooperative for the Disposal of Radioactive Waste CH-5430, Wettingen, Switzerland

Geochemical processes in a repository with clay barriers at high saline conditions

Claudia Joseph

Bundesgesellschaft für Endlagerung, Germany

Cement-Bentonite Interaction with Different Cement Materials at Elevated Temperatures 2: Modeling

Sohtaro ANRAKU¹, Ryohei KAWAKITA¹, Yuji HANAMACHI², Seiichiro MITSUI¹, Hiroshi SASAMOTO¹, Morihiro MIHARA¹

¹Japan Atomic Energy Agency (JAEA), Japan; ²QJ Science Ltd., Japan

Comparison of different iron/bentonite exhibition tests and effect of the type of exchangeable cation on corrosion products

Stephan Kaufhold¹, Kristian Ufer¹, Reiner Dohrmann², Franz Renz³, Rene Lucka³, Maximilian Kilic³

¹BGR, Germany; ²LBEG; ³LUH

Sulfide Transport Through MX-80 Bentonite Under Various Geochemical Conditions

Magdalena Krol¹, Farhana Chowdhury¹, Sifat Papry¹, Md Abullah Asad¹, Pulin Mondal¹, Tarek Rashwan², Ian Molnar³, Mehran Behazin⁴, Peter Keech⁴

¹Department of Civil Engineering, Lassonde School of Engineering, York University, Toronto, Canada; ²Department of Engineering and Innovation, The Open University (UK), Milton Keynes, England, United Kingdom; ³School of Geosciences, University of Edinburgh, Edinburgh, Scotland, United Kingdom; ⁴Nuclear Waste Management Organization, Toronto, ON, Canada

Concrete-clay interaction – a systematic review and modelling study

Marcelo Laviña¹, Andrés Idiart¹, Olga Riba¹, Fidel Grandia¹, Nicolas Michau², Xavier Bourbon², Benoit Cochepin²

¹Amphos 21 Consulting SL, Spain; ²Andra, France

Studying the reactive transport of CO2 in Opalinus Clay with experimental and numerical analyses

Shuang Chen¹, Christian Ostertag-Henning¹, Vinay Kumar¹, Haibing Shao², Gesa Ziefle¹, Jobst Maßmann¹

¹Federal Institute for Geosciences and Natural Resources, BGR, Germany; ²Department of Environmental Informatics, Helmholtz Centre for Environmental Research - UFZ, Leipzig, Germany

Exchangeable and soluble ion populations in semi-technical scale Sandwich sealing system experiments

Eleanor Bakker¹, Martin Hofmann², Thomas Nagel², Franz Königer³, Rainer Schuhmann³, Katja Emmerich¹

¹Institut für Massivbau und Baustofftechnologie (IMB/MPA/CMM), Karlsruhe Institute of Technology, Karlsruhe, Germany; ²Institut für Geotechnik, TU Bergakademie Freiberg, Germany; ³Ingenieur-Gesellschaft für Sensorik in der Umwelttechnik mbH (ISU), Karlsruhe, Germany

Delving into Bentonite Sedimentation Dynamics

Macarena Leal Olloqui¹, Daniel Svensson¹, Heikki Laitinen¹, Kenji Ishii², Patrik Sellin¹

¹SKB (Svensk Kärnbränslehantering AB), Oskarshamn, Sweden; ²Kajima Corporation, Tokyo, Japan

Leaching kinetics of metakaolin in alkaline solution

Ryosuke Kikuchi, Xiaobo Niu, Yogarajah Elakneswaran

Hokkaido University, Japan

Reactive transport model of the long-term geochemical evolution in the near field of a HLW repository at the disposal cell scale: sensitivi-ties, variants and model simplifications

Javier Samper, Alba Mon, Luis Montenegro

Universidad de A Coruña, Spain

MINFF: A new classical forcefield for (clay-)minerals

Michael Holmboe

Umeå University, Sweden

Five-year laboratory tests of thermo-hydro-mechanical-chemical evolution of compacted bentonite: an experimental and modelling study

María Victoria Villar¹, Andrés Idiart², Emilie Coene², Jaime Cuevas³, Ana María Melón¹, Ana Isabel Ruiz³, Almudena Ortega³, Rubén Iglesias¹, Ville Heino⁴

¹CIEMAT, Spain; ²Amphos 21 Consulting S.L., Spain; ³UAM, Spain; ⁴POSIVA, Finland

Deriving a Method for Host Rock specific Temperature Compatibility: Clay Rock

Kim-Marisa Mayer, Oliver Czaikowski, Bernd Förster, Matthias Hinze, Artur Meleshyn, Marvin Middelhoff, André Rübel, Klaus Wieczorek, Jens Wolf

Gesellschaft für Anlagen- und Reaktorsicherheit, Germany

Influence of temperature on the self-sealing of fractures in the Callovo-Oxfordian claystone

Mensan AGBOLI, Dragan GRGIC, Mohamed MOUMNI

University of Lorraine-CNRS, France

Conclusions on the post-yield behaviour of Opalinus claystone from multistage triaxial tests

Eleni Gerolymatou¹, Martin Kracht², Maximiliano Vergara³

¹TU Clausthal, Germany; ²gbm Gesellschaft für Baugeologie und -meßtechnik mbH - Baugrundinstitut, Ettlingen, Germany; ³Skava Consulting, Salzburg, Austria

Effect of pore water salinity on the tensile strength of Boom Clay

Ties de Jong, Bhini Chandan Malagar, Philip J. Vardon, Anne-Catherine Dieudonné

Delft University of Technology, Delft, The Netherlands

THM-Modelling of the ALC1605 in situ heating experiment in Cal-lovo-Oxfordian clay formation

Eric Simo^1,2, David Seidel¹, Thomas Nagel², Alexandru Tatomir⁵, Miguel Mánica⁴, Jörg Buchwald³, Dmitri Naumov³

¹BGE TECHNOLOGY GmbH, Peine, Germany; ²Geotechnical Institute, TU Bergakademie Freiberg, Freiberg, Germany; ³Helmholtz Centre for Environmental Research – UFZ, Leipzig, Germany; ⁴Institute of Engineering, National Autonomous University of Mexico, Mexico City, Mexico; ⁵BGE, Peine, Germany

Open-source implementation of a transversely isotropic elasto-visco-plastic damage model for clay shales in MFront and OpenGeoSys

Mehran Ghasabeh¹, Kavan Khaledi², Bastian Graupner³, Florian Amann^2,4, Thomas Nagel¹

¹Chair of Soil Mechanics and Foundation Engineering, Geotechnical Institute, TU Bergakademie Freiberg, Germany; ²Fraunhofer Research Institution for Energy Infrastructure and Geothermal Systems IEG, Competence Center Geomechanics and Georisks, Aachen, Germany; ³Swiss Federal Nuclear Safety Inspectorate (ENSI), Brugg, Switzerland; ⁴Chair of Engineering Geology and Hydrogeology, RWTH Aachen, Germany

Numerical simulation of bentonite saturation at different temperatures

Larissa Friedenberg, Artur Meleshyn, Matthias Hinze

Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany

Temperature history effect on swelling pressure of Kunigel-V1 bentonite cured in confined condition

Kunlin RUAN

Waseda University, Japan

Evolution of gases in an unsaturated bentonite buffer

Mattias Åkesson, Heikki Laitinen, Patrik Sellin

SKB, Sweden

Changes in swelling and hydrological characteristics of compacted bentonite by heating at 200 °C

Yasutaka Watanabe¹, Ema Yoshikawa¹, Misato Shimbashi¹, Shingo Yokoyama¹, Takahiro Goto², Yoichi Yamamoto²

¹Central Research Institute of Electric Power Industry, Japan; ²Nuclear Waste Management Organization of Japan, Japan

Current status of the in-situ interaction experiment at the Bukov URF

Anna Golubko¹, Jan Smutek¹, Jiří Svoboda²

¹Radioactive Waste Repository Authority - SÚRAO, Czech Republic; ²Czech Technical University in Prague, Czech Republic

Sampling, Measurements and Analysis of the Clay Barriers in the Prototype Repository at Äspö HRL

Magnus Kronberg¹, Patrik Sellin¹, Daniel Svensson¹, Fredrik Vahlund¹, Torbjörn Sandén²

¹SKB, Swedish Nuclear Fuel and Waste Management Company; ²Clay Technology

Investigating thermal coupling in a bentonite buffer

Stamatina Alexandropoulou¹, Lidija Zdravkovic¹, David Potts¹, Matthew Kirby², Simon Norris²

¹Imperial College London, United Kingdom; ²Nuclear Waste Services, United Kingdom

Research into the Impact of Non-homogeneity on the Integrity of Bentonite Materials

Markéta Kučerová, Jiří Svoboda

Czech Technical University in Prague, Czech Republic

TH-Modelling for the in-situ HotBENT experiment at the Grimsel Test Site

Victoria Burlaka¹, Eric Simo^1,2, Tymofiy Gerasimov¹, David Seidel¹, Thomas Nagel², Christoph Lehmann³, Jörg Buchwald³, Dmitry Naumov³, Alexandru Tatomir⁴

¹BGE TECHNOLOGY GmbH, Germany; ²Geotechnical Institute, TU Bergakademie Freiberg; ³Helmholtz Centre for Environmental Research – UFZ; ⁴BGE mbH, Federal Company for Radioactive Waste Disposal

Influence of sand mixture on gas pressure for bentonite

Tomoyoshi Nishimura

Ashikaga University, Japan

Changing of axial strains in creep performance for bentonite-sand mixture

Tomoyoshi Nishimura

Ashikaga University, Japan

Cation exchange simulation in Wyoming-type bentonite considering mechanical issues

Xavier Pintado¹, Rubén López-Vizcaíno², Ángel Yustres², Vicente Navarro², Laura Asensio², Sirpa Kumpulainen¹, Mika Niskanen³

¹Mitta Engineering Oy, Finland; ²Universidad de Castilla-La Mancha, Spain; ³Posiva Oy, Finland

Benchmarking of Double-Structure Models for the Numerical Simulation of Swelling Clays

Christian B. Silbermann¹, Matthias Hinze², Larissa Friedenberg², Philipp Schädle³, Markus Knauth⁴, Thomas Nagel¹

¹Geotechnical Institute, TU Bergakademie Freiberg, Germany; ²Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Braunschweig, Germany; ³Swiss Federal Nuclear Safety Inspectorate (ENSI), Brugg, Switzerland; ⁴Institut für Gebirgsmechanik GmbH, Leipzig, Germany

3D Modelling of Coupled Hydro-Mechanical Processes in Fractured Opalinus Clay Shale

Muhammad Raharsya Andiva¹, Qinghua Lei¹, Martin Ziegler²

¹Department of Earth Sciences, Uppsala University, Uppsala, Sweden; ²Federal Office of Topography (swisstopo), Mont Terri URL, St-Ursanne, Switzerland

Impact of desaturation on the diffusion of gases in clay-based samples

Elke Jacops¹, Aadithya Gowrishankar^1,2, Norbert Maes^1,2, Pieter Verboven², Hans Janssen²

¹SCK CEN, Belgium; ²KU Leuven, Belgium

Young’s modulus in claystones – adding complexity, reducing uncertainty

Sandra Schumacher, Werner Gräsle

Federal Institute for Geosciences and Natural Resources, Germany

Gas breakthrough simulation using bimodal porosity and mul-tiscale approach

Eike Radeisen^1,3, Hua Shao¹, Jürgen Hesser¹, Michael Pitz^1,4, Wenqing Wang², Olaf Kolditz^2,3

¹Federal Institute for Geosciences and Natural Resources (BGR), Germany; ²Helmholtz Center for Environmental Research (UFZ), Germany; ³Dresden University of Technology (TUD), Germany; ⁴Technische Universität Bergakademie Freiberg (TUBAF), Germany

Development of a two-phase hysteretic model accounting for water and gas entry pressure for evaluating hysteretic hydrodynamic properties of clay-based materials in a deep geological repository for radioactive waste

Zakaria Saâdi

Institut de Radioprotection et de Sûreté Nucléaire (IRSN), France

Testing device for the visualisation of gas-driven cracks in clays

Joaquín Liaudat, Philip J. Vardon, Michael A. Hicks, Anne-Catherine Dieudonné

Delft University of Technology, The Netherlands

Erosion of compacted bentonite at elevated temperature

Majid Sedighi, Ziheng Wang, Linhau He, Huaxiang Yan, Mojgan Hadi Mosleh, Andrey Jivkov

The University of Manchester, United Kingdom

Observations and Quantification of Gas Flow in Sand-Bentonite Mixtures using Analogue Tests

Elliot James Muir Bird, Robert Cuss, Phil Neep

British Geological Survey, United Kingdom

FE-G: 10 years of gas dynamics observations at the Full-Scale Emplacement experiment (Opalinus Clay, Mont Terri, CH)

Emiliano Stopelli¹, Typhaine Guillemot¹, Myriam Agnel², Scott Briggs³, Fraser King⁴, Rolf Kipfer⁵, Simon Norris⁶, Nikitas Diomidis¹, Irina Gaus¹, Raphael Schneeberger¹

¹Nagra, Switzerland; ²ANDRA, France; ³NWMO, Canada; ⁴ICC Ltd, Canada; ⁵Eawag, Switzerland; ⁶NWS, United Kingdom

14 years long Gas Experiment in borehole PAC1011 at ANDRA’s Un-derground Research Laboratory: Modelling the injection and transport of an Argon/Helium gas mixture in the Callovo-Oxfordian Claystone under in situ conditions

Nicolas Barret¹, Jean Croisé², Agnès Vinsot³, Myriam Agnel³, Rémi de La Vaissière³

¹INTERA, France; ²INTERA, Switzerland; ³ANDRA, France

What limits the temperature at canister surface in clay-based HLRW concepts? – Discussion in an international context

Saleem Chaudry, Reiner Dohrmann, Robert Lippmann

State Authority for Mining, Energy and Geology (LBEG), Hannover, Germany

The role of bentonite in the high-level radioactive waste repository design

Eva-Maria Gottron, Merle Bjorge, Stephen Klimke, Marc Wengler, Anne Bartetzko, Wolfram Rühaak

Federal Company for Radioactive Waste Disposal (BGE), Germany

Preliminary design of a disposal facility for high-level radioactive waste in claystone

Michael Werres¹, Stephen Klimke¹, Dominik Gottron¹, Frederik Fahrendorf¹, Niklas Bertrams², Thomas Lohser¹, Wolfram Rühaak¹

¹Bundesgesellschaft für Endlagerung mbH, Germany; ²BGE Technology GmbH, Germany

Characterization of the Lower Cambrian and the Lower Triassic clayey formations in terms of the potential for the sitting of Deep Geological Repository of radioactive waste in Lithuania

Jurga Lazauskienė^1,2, Jolanta Čyžienė²

¹Vilnius University, Lithuania; ²Lithuanian Geological Survey under Ministry of Environment

Geological variability of the Opalinuston-Formation in Southern Germany: new insights from the research project SEPIA

Thomas Mann¹, Tilo Kneuker¹, Géraldine Nicole Zimmerli², Jochen Erbacher^1,3, André Bornemann¹, Bernhard Schuck¹, Reiner Dohrmann^1,3, Christoph Neukum¹, Lukas Pollok¹

¹Federal Institute for Geosciences and Natural Resources (BGR), Hannover, Germany; ²Department of Geosciences, University of Fribourg, 1700 Fribourg, Switzerland; ³State Authority for Mining, Energy and Geology (LBEG), Hannover, Germany

OVERVIEW OF GEODYNAMIC EVOLUTION EFFECT ON HYDROGEOLOGICAL PERFORMANCE OF DEEP GEOLOGICAL REPOSITORY SITE FOR RAWASTE. FEED BACK AND LESSONS LEARNED FROM TWO DECADES OF STUDIES

Hakim BENABDERRAHMANE, Johan HOLMEN

GeoRem Oy, Finland

Kiirunavaara Ca-smectite, northern Sweden: a natural analogue of long-term clay stability

Raphael Schneeberger¹, Ulf B. Andersson², Albert Gilg³, Illya Bindeman⁴, Reiner Dohrmann⁵, Sirpa Kumpulainen⁶, Leena Kiviranta⁶, W. Crawford Elliott⁷, J. Marion Wampler⁷, Cyprian Ozigbo⁸, Igor Villa⁹, Tsubasa Otake¹⁰, Ryosuke Kikuchi¹⁰, Tatsuya Fujimura¹¹, Tsutomu Sato¹⁰, Satoru Suzuki¹², Takahiro Goto¹², Shuhei Nemoto¹², Rizlan Bernier-Latmani¹³, Natalia Jakus¹³, Russell W. Alexander¹⁴, Nicolas Michau¹⁵, Mehran Behazin¹⁶, Alex Hughes¹⁷, Simon Norris¹⁷, Ville Heino¹⁸, Patrik Sellin¹⁹, Daniel Svensson¹⁹, Olivier X. Leupin¹

¹Nagra, Switzerland; ²LKAB, Sweden; ³Technische Universität München, Germany; ⁴University of Oregon, USA; ⁵BGR, Germany; ⁶Mitta, Finland; ⁷Georgia State University, USA; ⁸Columbine Corporation, USA; ⁹University of Bern, Switzerland and University of Milan Bicocca, Italy; ¹⁰Faculty of Engineering, Hokkaido University, Japan; ¹¹Graduate School of Engineering, Hokkaido University, Japan (currently: Civil Engineering Department, Nuclear Facilities Division, Taisei Corporation, Japan); ¹²NUMO, Japan; ¹³EPFL, Switzerland; ¹⁴Bedrock Geosciences, Switzerland; ¹⁵Andra, France; ¹⁶NWMO, Canada; ¹⁷NWS, UK; ¹⁸Posiva, Finland; ¹⁹SKB, Sweden

Unveiling early diagenetic carbonate precipitation: Sequential C-isotope analysis of calcite and siderite in Opalinus Clay

Stephan Wohlwend¹, Lukas Aschwanden¹, Carmen Zwahlen¹, Martin Mazurek¹, Gaudenz Deplazes²

¹Institute of Geological Sciences, University of Bern, 3012 Bern, Switzerland; ²Nagra, 5430 Wettingen, Switzerland

Geochemistry of pore waters in Opalinus Clay at the Mont Terri Rock Laboratory within the Bitumen-Nitrate-Clay interaction experiment

Torben Weyand¹, Michael Jendras¹, Katrien Hendrix², Nele Bleyen²

¹Bundesamt für die Sicherheit der nuklearen Entsorgung (BASE), Germany; ²Belgian Nuclear Research Centre (SCK CEN), Belgium

39Ar and 37Ar in deep groundwater: Evaluation regarding young components, cross-formation flow and in-situ production

Daniel Rufer¹, Roland Purtschert², H. Niklaus Waber³, Michael Heidinger⁴, Daniel Traber⁵, Jens Becker⁵

¹Institute of Geological Sciences, University of Bern, Bern, Switzerland; ²Climate & Environmental Physics, Physics Institute, University of Bern, Bern, Switzerland; ³WaterGeoChem Consulting, Bern, Switzerland; ⁴Hydroisotop GmbH, Schweitenkirchen, Germany; ⁵Nagra, Wettingen, Switzerland

Geochemical profiles in the hydrogeological system of the Opalinus Clay at Mont Terri, Switzerland

Marie Bonitz¹, Anja Maria Schleicher², Theresa Hennig¹, David Jaeggi⁴, Michael Kühn^1,3

¹GFZ German Research Centre for Geosciences, Fluid Systems Modelling, Potsdam, Germany; ²GFZ German Research Centre for Geosciences, Inorganic and Isotope Geochemistry, Potsdam, Germany; ³University of Potsdam, Institute of Geosciences, Potsdam, Germany; ⁴Federal Office of Topography Swisstopo, Wabern, Switzerland

Crushed claystone used as material for the construction of EBS-components in repositories for nuclear waste – A generic methodology for material selection

Marvin Middelhoff

Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany

Rock mass response to processes in a Sandwich shaft sealing system

Jürgen Hesser¹, Matthias Hinze², Markus Furche¹, David Jaeggi³, Senecio Schefer³

¹Federal Institute for Geosciences and Natural Resources (BGR), Germany; ²Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany; ³Bundesamt für Landestopografie (swisstopo), Switzerland

Modelling sulfide corrosion in the Swiss HLW repository under various repository settings

Jin Ma¹, Paul Wersin¹, Nikitas Diomidis²

¹University of Bern, Switzerland; ²Nagra, Switzerland

As-Placed Dry Density of Gap Fill Material in Overbreak Zones within the Placement Room

CHANG SEOK KIM, KENNETH BIRCH, PETER KEECH

Nuclear Waste Management Organization, Canada

Excavation of the Konrad 2 shaft landing station in a clay and marl claystone: geotechnical challenges and support solutions

Stephan Gehne¹, Mike Lieske¹, Jan Bauer¹, Rainer Weißmann¹, Mirko Polster², Volker Busse¹

¹Bundesgesellschaft für Endlagerung mbH, Germany; ²BGE TECHNOLOGY GmbH, Germany

Feedback on the multi-scale mechanical and technical demonstration of drift construction at the French URL

Jad Zghondi, Gilles Armand, Jana Jaber, Minh-ngoc Vu, Jan Cornet, Carlos Plua, Roy Chaaya

Andra, France

A wireless data transmission system for the future deep geological repository

José Luis García-Siñeriz¹, Susana Tuñón¹, María Rey¹, Juan Carlos Mayor², Katja Emmerich³, Matthias Hinze⁴, David Jaeggi⁵, Senecio Schefer⁵

¹Amphos 21 Consulting S.L., Spain; ²Empresa nacional de residuos radiactivos (Enresa), Spain; ³Karlsruhe Institute of Technology (KIT), IMB/MPA/CMM, Karlsruhe, Germany; ⁴Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Braunschweig, Germany; ⁵Bundesamt für Landestopografie (swisstopo), St-Ursanne, Switzerland

Observation of saturation processes in the Sandwich experiment with ERT (URL Mont Terri)

Markus Furche

Bundesanstalt für Geowissenschaften und Rohstoffe, Germany

Influence of polysulfide radicals in measuring corrosion rates of a carbon steel API 5L X65 in contact with cement grout in future nucle-ar waste disposal program

Yendoube Charles SANO MOYEME¹, Stéphanie BETELU¹, Johan BERTRAND², Stéphane GABOREAU¹, Karine GROENEN-SERRANO³

¹BRGM, Orléans, France; ²ANDRA, Châtelet-Malabry, France; ³LGC, Toulouse, France

Estimating Water Retention of Compacted Bentonite with Cat-Boost: Integrating Physical Model Residuals and Penalized Learning

Muntasir Shehab, Reza Taherdangkoo, Christoph Butscher

Institute of Geotechnics, TU Bergakademie Freiberg, Gustav-Zeuner-Str. 1,Freiberg, 09599, Germany

Full-Scale In-Situ System Test (FISST) at the Finnish spent nuclear fuel disposal facility. Analysis and simulation.

Xavier Pintado¹, Mika Niskanen²

¹Mitta Engineering Oy, Finland; ²Posiva Oy, Finland

MANAGEMENT OF SORPTION DATA IN SUPPORT TO RADIOACTIVE WASTE MANAGEMENT

Stéphane Brassinnes¹, Marta López-García², Darío Pérez², Maria Abada², Irene Canals², Albert Nardi², Lara Duro², David García²

¹Belgian Agency for Radioactive Waste and Enriched Fissile Materials (ONDRAF/NIRAS); ²Amphos21

Numerical analysis of permeability in sphere-platelet mixtures

Ryunosuke Oishi¹, Tsubasa Yagi², Otono Miura¹, Shusaku Harada¹

¹Hokkaido University, Japan; ²Radioactive Waste Management Funding and Research Center, Japan

Trace elements in Dutch Paleogene clays

Erika Neeft¹, Thilo Behrends², Alwina Hoving³, Jasper Griffioen³, Anne-Catherine Dieudonné⁴, Phil Vardon⁴, Marja Vuorio¹

¹COVRA, Netherlands, The; ²Utrecht University; ³TNO; ⁴Delft University of Technology

Effect of environmental conditions on the sorption of 241Am(III) on natural clayrocks and their main constituents

Liesbeth Van Laer¹, Dorien Verhaegen¹, Greet Verstrepen¹, Delphine Durce¹, Norbert Maes¹, Stéphane Brassinnes²

¹SCK CEN, Belgium; ²NIRAS/ONDRAF, Belgium

Radionuclide transport in variably water-saturated compacted clays: a pore-scale view

Yuankai Yang¹, Ravi A. Patel², Yaoting Zhang³, Nikolaos I. Prasianakis⁴, Jenna Poonoosamy¹, Guido Deissmann¹, Sergey V. Churakov^4,5, Dirk Bosbach¹

¹Forschungszentrum Jülich, Germany; ²Karlsruhe Institute of Technology (KIT), Germany; ³Queen’s University, Canada; ⁴Paul Scherrer Institut, Switzerland; ⁵University of Bern, Switzerland

Insights into the Interactions of Clay Minerals and Humic Acids: A Molecular Dynamics Study

Kanato Matsushima¹, Yuta Fukatsu², Takamitsu Ishidera², Ayano Eguchi², Kenji Yotsuji², Yukio Tachi³, Takahiro Ohkubo¹

¹Graduate School of Engineering, Chiba University, Japan; ²Nuclear Fuel Cycle Engineering Laboratories, Japan Atomic Energy Agency, Japan; ³Horonobe Underground Research Center, Japan Atomic Energy Agency, Japan

Transport Properties of Water in a Polydisperse Coarse-Grained Model of Sodium Montmorillonite

Yaoting Zhang¹, Mikaella Brillantes², Justine Kuczera¹, Keyvan Ferasat¹, Scott Briggs³, Chang Seok Kim³, Jason D. Giallonardo³, Thomas G. Tranter⁴, George Opletal⁵, Yuankai Yang⁶, Jane Howe², Laurent K. Beland¹

¹Department of Mechanical and Materials Engineering, Queen’s University, Kingston, Canada.; ²Department of Materials Science and Engineering, University of Toronto, Toronto, Canada; ³Nuclear Waste Management Organization, Toronto, Canada; ⁴Ionworks Technologies Inc, Pittsburgh, United States of America; ⁵Commonwealth Scientific and Industrial Research Organization, Data61, Melbourne, Australia; ⁶Institute of Energy and Climate Research – Nuclear Waste Management (IEK-6) and JARA-CSD, Forschungszentrum Jülich GmbH, Jülich, Germany

Comparison of experimental diffusion data of various cationic elements in rock samples from the deep-hole drilling campaign in northern Switzerland with model predictions by the ClaySorDif model

Martin A. Glaus¹, Petar Bunic¹, Dmitrii A. Kulik¹, Cyrill Lang¹, George D. Miron¹, Luc R. Van Loon¹, Raphael A.J. Wüst²

¹Paul Scherrer Institut, Switzerland; ²Nagra, Switzerland

Iron(II)-montmorillonite interaction: experimental results and model-ling for dispersed and compacted systems

Jebril HADI¹, Mirjam KICZKA¹, Andreas JENNI¹, Paul WERSIN¹, Jules GOETHALS², Jean-Marc GRENECHE³, Olivier LEUPIN⁴, Nikitas DIOMIDIS⁴

¹Institute of Geological Sciences, University of Bern, Bern, Switzerland; ²Laboratoire Subatech, Nantes, France; ³Le Mans Université, Le Mans, France; ⁴Nagra, Wettingen, Switzerland

Electrostatic interactions at clay mineral surfaces: linking geochem-istry with geomechanical properties

Christophe Tournassat^1,2, Wenming Dong², Nicolas Marty³, Sylvain Grangeon³, Carl Steefel²

¹Institut des Sciences de la Terre d’Orléans, Université d’Orléans, CNRS, BRGM, OSUC, Orléans 45071, France; ²Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, Berkeley, CA, USA; ³BRGM, Orléans, France

Transport experiments in claystone: electrostatic effects and preferential pathways

Andreas Jenni¹, Mirjam Kiczka¹, Carmen Zwahlen¹, Urs Mäder², Hans Meeussen³, Thomas Gimmi^1,4

¹University of Bern, Bern, Switzerland; ²Rock-Water Consulting, Boll, Switzerland; ³NRG, Petten, the Netherlands; ⁴Laboratory for Waste Management, Paul Scherrer Institut, Villigen, Switzerland

Experimental investigation of the changes in transport properties of Opalinus claystone/concrete interface samples from the Mont Terri CI experiment

Norbert Maes¹, Quoc Tri Phung¹, Thi Nhan Nguyen^1,2, Anneleen Vanleeuw¹

¹SCK CEN, Belgium; ²KULeuven, Belgium

Cement-Bentonite Interaction with Different Cement Materials at Elevated Temperatures 1: Experiments

Ryohei Kawakita¹, Sohtaro Anraku¹, Yuji Hanamachi², Seiichiro Mitsui¹, Hiroshi Sasamoto¹, Morihiro Mihara¹

¹Japan Atomic Energy Agency, Japan; ²QJ Science Ltd., Japan

Gains and losses of exchangeable cations in ‘alternative bentonite buffer material in-situ tests’ (ABM-1, -2 and -5) after heating from 140 °C to 250 °C - what has caused observed differences?

Reiner Dohrmann^1,2, Jens Gröger-Trampe^1,2, Stephan Kaufhold²

¹LBEG, Germany; ²BGR, Germany

Evolution of microbial populations under the influence of increasing temperature in the Callovian-Oxfordian clay-rich rock

Mélanie Lundy¹, Marc Labat², Sylvie Daumas³, Stefan Wechner⁴, Yannick Linard¹

¹Andra, France; ²Aix-Marseille Université, France; ³CFG, France; ⁴Hydroisotop GmbH, Germany

Differences between the basal spacings of random powder patterns and air-dried oriented aggregates of bentonite samples

Ana Beatriz Zabala¹, María Victoria Villar¹, Jaime F. Cuevas²

¹CIEMAT, Spain; ²UAM, Spain

Hydrogeochemical processes occurring in excavated argillaceous rocks stored at the surface as heaps and consequences on water chemistry

Myriam I. Agnel¹, Adrien Schwindt¹, Mathieu Debure², Joachim Tremosa³, Yves Thiry¹, Paul-Olivier Redon¹

¹Andra, Centre de Meuse/Haute-Marne, 55290 Bure, France; ²BRGM, French Geological Survey, 3 av. Claude-Guillemin, 45060 Orléans, France; ³Geostock, 92500 Rueil-Malmaison, France

A mechanistic understanding of bentonite alteration at corroding iron interfaces

Haydn Martin Haynes¹, Graham Kenyon¹, James Hesketh¹, Cristiano Padovani¹, Lorraine Field², Nikitas Diomidis³

¹Jacobs Clean Energy, Didcot, United Kingdom; ²British Geological Survey, Keyworth, United Kingdom; ³Nagra, Wettingen, Switzerland

Mutual effects of pH, matrix elements and organic ligands on the mobility of U(VI) in bentonite systems

Katja Schmeide¹, Thimo Philipp^1,2, Claudia Sieber¹, Nina Huittinen¹

¹Helmholtz-Zentrum Dresden - Rossendorf, Institute of Resource Ecology, Germany; ²Present address: Federal Office for the Safety of Nuclear Waste Management (BASE), Germany

Quantitative analysis of the mineralogical composition of bentonites by full pattern fitting using the powdR package

Stephen Hillier^1,2, Stephan Kaufhold³, Kristian Ufer³, Jan Dietel⁴, Adrián Lorenzo⁵, Mercedes Suárez⁵

¹James Hutton Institute, United Kingdom; ²Department of Soil and Environment, SLU, Uppsala, Sweden; ³BGR, Hannover, Germany; ⁴Landeslabor Berlin-Brandenburg, Berlin, Germany; ⁵Universidad de Salamanca, Salamanca, Spain

Acidification and CO2-degassing in bentonites triggered by oxida-tion of Fe(II)–containing minerals

Stefan Dultz

Leibniz Universität Hannover, Germany

Dynamic and static experiments for the identification of the effect of transient processes on corrosion

Ana María Fernández, Ursula Alonso, Paula Nieto, Manuel Mingarro, Tiziana Missana

CIEMAT, Spain

Effect of organic molecules on radionuclide retention in COx clay rock: the case of Ni-TBP/EDTA mixtures

Romain V.H. Dagnelie¹, Marwa Assaf¹, Emilie Thory¹, Pierre Henocq²

¹Université Paris-Saclay, CEA, Service de Physico-Chimie, 91191, Gif-sur-Yvette; ²Andra, R&D Division, parc de la Croix Blanche, 92298, Châtenay-Malabry

Distorting mirrors – new perspectives on the layer charge reduction phenomena in heat-treated smectites: implications for CEC measurements in bentonites

Artur Kuligiewicz, Arkadiusz Derkowski, Nadine J. Kanik

Institute of Geological Sciences, Polish Academy of Sciences, Poland

Self-sealing potential of fractures as a result of hydration, shear, and temperature

Robert Cuss¹, Andrew Wiseall², Jon Harrington¹

¹British Geological Survey, United Kingdom; ²now at Nuclear Waste Services, United Kingdom

Effect of Sodium Occupancy and Solute Concentration on the Swelling Behaviour of Poorly Indurated Boom Clay

Hassan AL MAIS^1,2,3, Frederic COLLIN¹, Yu-Jun CUI², XiangLing LI³, Elie VALCKE³, Lian WANG³, Suresh SEETHARAM³, Temenuga GEORGIEVA³

¹Université de Liège, Belgium; ²Ecole des Ponts et Chaussées, Champs-sur-Marne, France; ³SCK-CEN, Mol, Belgium

The anisotropic creep behaviour and the long-term strength of Opalinus Clay

Lina Gotzen¹, Lisa Winhausen¹, Mohammadreza Jalali¹, Florian Amann^1,2

¹Department of Engineering Geology and Hydrogeology, RWTH Aachen, Germany; ²Fraunhofer Research Institution for Energy Infrastructures and Geothermal Systems IEG, Germany

Numerical analyses of geological barrier integrity under parameter uncertainty

Jan Thiedau, Maximilian Bittens, Maßmann Jobst, Mayr Sibylle

Bundesanstalt für Geowissenschaften und Rohstoffe, Germany

Assessment of in-situ heater experiments conducted in the Callo-vo-Oxfordian claystone based on the French high-level radioactive waste disposal concept

Carlos Plúa¹, Minh-Ngoc Vu², Frédéric Bumbieler², Armand Gilles¹

¹Andra, Meuse/Haute-Marne Underground Research Laboratory, Bure, France; ²Andra, Châtenay-Malabry, France

HE-E heating experiment in the Mont Terri rock laboratory - sampling of a hot, unconsolidated granular bentonite buffer after 12 years of heating during continued operation

Florian Kober¹, Urs Mäder², Maria Villar³, Bill Lanyon⁴

¹Nagra, Switzerland; ²Rock Water Consulting, Boll, Switzerland; ³CIEMAT, Madrid, Spain; ⁴Fracture Systems Ltd., St. Ives, Great Britain

A standard thermodynamic-based extension of the Modified Cam-Clay model for plastic-viscoplastic geomaterials

Simon Raude, Goustan Bacquaert, Kyrylo Kazymyrenko, David Haboussa

EDF, France

Enhancements to a Hydromechanical Material Model for Compacted Bentonite

Ola Kristensson¹, Mattias Åkesson²

¹Clay Technology, Lund, Sweden; ²Swedish Nuclear Fuel and Waste Management Co, Solna, Sweden

Numerical analysis of the re-saturation of bentonites under isothermal and non-isothermal conditions using a double-porosity model

Ramon Vasconcelos¹, Antonio Gens¹, Carlos Eduardo Rodríguez¹, Jean Vaunat¹, María Victoria Villar²

¹Universitat Politècnica de Catalunya (UPC) - CIMNE, Barcelona, Spain; ²Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain

HYDRO-MECHANICAL BEHAVIOUR OF BENTONITE AT HIGH TEMPERATURE

NATALIA GIMENO, RUBÉN JAVIER IGLESIAS, GUILLERMO GARCIA, MARIA VICTORIA VILLAR

CIEMAT, Spain

Geochemical modelling of mineral-water reaction between Bavarian bentonite B25 and Opalinus clay pore solution

Kyra Jantschik, Artur Meleshyn

GRS gGmbH, Germany

Thermochemical alterations in montmorillonite: Experiment constraints in the presence of organic anion ligands

Ritwick Sudheer Kumar, Laurence N. Warr, Georg H. Grathoff, Balu R. Thombare

University of Greifswald, Institute for Geography and Geology, Department of Economic Geology and Mineralogy, Greifswald, Germany

Tracking bentonite-water interactions by stable-H- and O-isotope exchange over a thermal gradient: First isotopic results from the Alternative Buffer Materials 2 and 5 bentonites

Nadine J. Kanik¹, Fred J. Longstaffe², Arkadiusz Derkowski¹, H. Albert Gilg³

¹Institute of Geological Sciences, PAS, Poland; ²The University of Western Ontario; ³Technical University of Munich

Engineered Barrier 200C – High temperature in-situ experiment

Jiří Svoboda, Radek Vašíček

Czech Technical University, Czech Republic

Modeling of the HotBENT test using COMSOL Multiphysics

Daniel Malmberg¹, Alex Spetz¹, Chang Seok Kim²

¹Clay Technology Lund AB, Sweden; ²Nuclear Waste Management Organisation, Canada

Modelling the Disturbed Rock Zone behaviour in a Deep Geological Repository

Nandini Adla, Pavan Kumar Bhukya, Dali Naidu Arnepalli

Deaprtment of Civil Engineering, Indian Institute of Technology, Madras, India

Elastic-plastic components in void ratio with suction

Tomoyoshi Nishimura¹, Hanbing Bian², Isam Shahrour³

¹Ashikaga University, Japan; ²Polytech'Lille, Université de Lille, France; ³Polytech'Lille, Université de Lille, France

Benchmark case for non-isothermal multiphase flow and reactive transport for radioactive waste disposal

Javier Samper¹, Alba Mon¹, Etienne Ausborde², Tianfu Xu³, Yu Han³, Milan Hokr⁴, Asta Narkuniene⁵, Luis Montenegro¹, Brahim Amaziane², Mustapha Elossmani², Y Yuan³, Jan Sembera⁴, Povilas Poskas⁵

¹Universidad de A Coruña, Spain; ²E2S UPPA, CNRS, LMAP, Universite de Pau et des Pays de l’Adour, Pau, France; ³College of New Energy and Environment, Jilin University, Changchun 130021, P. R. China; ⁴Technical University of Liberec (TUL) Czech Republic; ⁵Lithuanian Energy Institute, Nuclear Engineering Laboratory, Kaunas, Lithuania

Experimental and numerical modelling of binary bentonite-based mixture compressibility

Arisleidy Mesa-Alcantara¹, Enrique Romero^1,2, Joel Torres-Serra², Nadia Mokni³

¹International Centre for Numerical Methods in Engineering (CIMNE), Barcelona, Spain; ²Universitat Politècnica de Catalunya, Barcelona, Spain; ³Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Fontenay-aux-Roses, France

The influence of faults on the geomechanical properties of Opal-inus Clay – First results from the PF-A experiment

Lisa Winhausen¹, Florian Amann^1,2, Martin Ziegler³, Chris J. Marone^4,5

¹Department of Engineering Geology, RWTH Aachen, Germany; ²Fraunhofer Research Institution for Energy Infrastructures and Geothermal Systems IEG, Aachen, Germany; ³Swiss Federal Office of Topography (swisstopo), Mont Terri URL, St-Ursanne, Switzerland; ⁴Dipartimento di Scienze della Terra La Sapienza Università di Roma, Italy; ⁵Department of Geosciences, Pennsylvania State University, Pennsylvania, USA

Diffusion of dissolved gases in clay: a collaborative modelling exercise of EURAD GAS

Elke Jacops¹, Li Yu¹, Joan Govaerts¹, Abhishek Gupta², Michael Pitz^3,8, Gesa Ziefle³, Anne-Catherine Dieudonné⁵, Asta Narkuniene⁶, Frédéric Collin⁷, Gilles Corman⁷, Séverine Levasseur⁴

¹SCK CEN, Belgium; ²Aalto University, Finland; ³BGR, Germany; ⁴ONDRAF/NIRAS, Belgium; ⁵TU Delft, The Netherlands; ⁶Lei, Lithuania; ⁷ULiège, Belgium; ⁸TU Bergakademie Freiberg, Germany

Experimental Study on Evaluation Method of Apparent Erosion Rate Constant of Bentonite using X-ray CT Images

Norihisa Osawa¹, Tomoko Ishii^1,2, Kenji Ishii³, Yuichi Niibori²

¹Taiheiyo Consultant Co., Ltd., Japan; ²Tohoku University, Japan; ³Kajima Corporation, Japan

Modeling of gas propagation along a micro-tunnel in the Meuse / Haute-Marne Underground Research Laboratory

Cécile Coulon¹, Guillermo Martinez¹, Catherine Yu¹, Thomas Cavalera¹, Mohamed Hayek¹, Rémi de La Vaissière²

¹INTERA Incorporated, France/Switzerland/United States; ²ANDRA, Bure, France

The effect of an alkaline plume on the self-sealing capacity of Boom Clay evidenced by high resolution computed tomography and hy-draulic conductivity measurements

Miroslav Honty¹, Ivan Josipovic², Matthieu N. Boone², Severine Levasseur³, Xavier Sillen³

¹SCK-CEN, Belgian Nuclear Research Center, Mol, Belgium; ²UGent, Department of Physics and Astronomy, Gent University, Belgium; ³ONDRAF/NIRAS, Belgian National Agency for Radioactive Waste and Enriched Fissile Materials, Brussels, Belgium

Modelling gas drainage in argillite pores with SPH method

Kayani Ganeshalingam^1,2, Magdalena Dymitrowska¹, Djimédo Kondo²

¹Institut de Radioprotection et de Sûreté Nucléaire(IRSN), PSE-ENV/SPDR/LETIS, France; ²Institut Jean le Rond d'Alembert, France

The Hydro-mechanical Interaction between Different Tunnel Support Strategies and the Excavation Damaged Zone (EDZ)

Sina Shivaei¹, Maximilian Schoen¹, Arash Alimardani Lavasan², Torsten Wichtmann¹

¹Chair of Soil Mechanics, Foundation Engineering and Environmental Geotechnics, Ruhr University Bochum, Bochum, Germany; ²Department of Civil Engineering, Luxembourg University, Luxembourg, Luxembourg

Gas transport along granite/bentonite interfaces

Vanesa Gutiérrez Rodrigo, Pedro Luis Martín Martín, María Victoria Villar Galicia

CIEMAT, Spain

Interactions at the interface between EBS-components of a repository for nuclear waste in claystone formations

Marvin Middelhoff¹, Jean Talandier²

¹Gesellschaft für Anlagen- und Reaktorsicherheit (GRS) gGmbH, Germany; ²Agence pour la gestion des déchets radioactifs (Andra), France

Mini GAST: Experimental Upscaling of an Engineered Gas Permeable Seal

Enrique Romero^1,2, Clara Alvarado², Antonio Lloret¹, Juliana Knobelsdorf², Thomas Spillmann³

¹Universitat Politècnica de Catalunya (UPC), Barcelona, Spain; ²International Centre for Numerical Methods in Engineering (CIMNE), Barcelona, Spain; ³National Cooperative for the Disposal of Radioactive Waste (Nagra), Wettingen, Switzerland

Laboratory scale experimental assessment of bentonite-sand mixtures

Caroline C. Graham¹, Jon F. Harrington¹, Qian Zhang¹, Jean Talandier², Remi de La Vaissière²

¹British Geological Survey (BGS), United Kingdom; ²Agence nationale pour la gestion des déchets radioactifs (ANDRA), France

Experimental study and numerical modeling of poromechanical be-haviour of Callovo-Oxfordian claystone under drained and undrained conditions

Yuhao ZHANG¹, Shouyi XIE¹, Jianfu SHAO¹, Minh-Ngoc VU²

¹University of Lille, France; ²Andra, France

Hydro-mechanical Properties of Rock and Bentonite Mixtures for Gas Management within Geological Disposal Facilities

Elise Wai-Ming Mouat¹, Ian L Molnar¹, Christopher McDermott¹, Bryne Ngwenya¹, Clare Bird², George Towler³

¹The University of Edinburgh, United Kingdom; ²Stirling University; ³Quintessa ltd